Add same_object test

src/webgpu/api/operation/adapter/info.spec.ts

@@ -40,26 +40,41 @@ g.test('adapter_info')
     );
   });
 
+g.test('same_object')
+  .desc(
+    `
+GPUAdapter.info provides the same object each time it's accessed`
+  )
+  .fn(async t => {
+    const gpu = getGPU(t.rec);
+    const adapter = await gpu.requestAdapter();
+    assert(adapter !== null);
+
+    const adapterInfo1 = adapter.info;
+    const adapterInfo2 = adapter.info;
+    t.expect(adapterInfo1 === adapterInfo2);
+  });
+
 g.test('device_matches_adapter')
-.desc(
-  `
+  .desc(
+    `
 Test that GPUDevice.adapterInfo matches GPUAdapter.info`
-)
-.fn(async t => {
-  const gpu = getGPU(t.rec);
-  const adapter = await gpu.requestAdapter();
-  assert(adapter !== null);
+  )
+  .fn(async t => {
+    const gpu = getGPU(t.rec);
+    const adapter = await gpu.requestAdapter();
+    assert(adapter !== null);
 
-  const device = await t.requestDeviceTracked(adapter);
-  assert(device !== null);
+    const device = await t.requestDeviceTracked(adapter);
+    assert(device !== null);
 
-  assert(device.adapterInfo instanceof GPUAdapterInfo);
-  assert(adapter.info instanceof GPUAdapterInfo);
+    assert(device.adapterInfo instanceof GPUAdapterInfo);
+    assert(adapter.info instanceof GPUAdapterInfo);
 
-  for (const k of Object.keys(GPUAdapterInfo.prototype)) {
-    t.expect(
-      objectEquals(device.adapterInfo[k], adapter.info[k]),
-      `device.adapterInfo.${k} is "${device.adapterInfo[k]}". Expected "${adapter.info[k]}"`
-    );
-  }
-});
+    for (const k of Object.keys(GPUAdapterInfo.prototype)) {
+      t.expect(
+        objectEquals(device.adapterInfo[k], adapter.info[k]),
+        `device.adapterInfo.${k} is "${device.adapterInfo[k]}". Expected "${adapter.info[k]}"`
+      );
+    }
+  });